On the Comparison of Optimal NOMA and OMA in a Paradigm Shift of Emerging Technologies

Non-orthogonal multiple access (NOMA) is a better technique than orthogonal (OMA), precisely frequency division (OFDMA) scheme, at the conceptual level for fifth-generation (5G) networks and beyond 5G (B5G) networks. We investigate potentials of schemes by comparing proposed NOMA scheme with traditional cooperative communication (CCNOMA) rather comparison between OMA only. To probe effectiveness as technique, we propose novel considering two adjacent BSs special design transceiver architecture. The provides reasonable data rate to both near user (NU) far (FU) without compromising quality service (QoS) anyone them. conclusive analyses on optimization framework multi-user sum rate, capacity, transmit power, spectral efficiency (SE), energy (EE) trade-off OFDMA have been established succession derivations. Under analytical framework, also prove quite few properties Simulation results confirm theoretical findings show that can efficiently approach optimal power allocation, minimization consumption, SE-EE trade-off, comparatively rates baseline scheme.